![]() The young will leave their nests from 27 to 40 days after hatching. Since the young do not hatch at the same time, they may be different sizes. Females begin incubating with the first egg laid, so hatching is asynchronous. The female lays from two to four eggs which are incubated for 27 to 31 days. Eggs are normally laid about three weeks after copulation. Polihierax semitorquatus usually will breed once per year, but will sometimes produce two broods in a favorable year. Mating System: monogamous polyandrous cooperative breeder This behavior may be influenced by limited availability of suitable nesting sites. Polihierax semitorquatus is usually seasonally monogamous, but is occasionally polyandrous, and it is not uncommon for two or more males to attend the same nest. The female will squat down and raise her tail feathers to indicate that she is prepared to mate. More is known of Polihierax semitorquatus breeding habits in the southern portion of their range, but birds in both areas engage in a relatively quiet display that includes bobbing of the head, wagging of the tail, and calling. Thus, this falcon is one of a few species of birds that are "obligate nest pirates" (also see South American troupials, Icterus icterus). Approximately one-quarter of all weaver nests in these areas are occupied by African pygmy falcons. Occasionally northeastern birds will occupy the nests of white-browed sparrow weavers ( Plocepasser mahali) and glossy starlings ( Lamprotornis nitens). ![]() white-browed sparrow weavers (Plocepasser mahali)Īfrican pygmy falcons rely on the social weavers ( Philetairus socius) in the northeast part of their range and white-headed buffalo weavers ( Dinemellia dinemelli) in the southwestern part of their range for nesting. ![]()
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